From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E858C433DF for ; Tue, 25 Aug 2020 02:51:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0BFE7204EC for ; Tue, 25 Aug 2020 02:51:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728501AbgHYCv0 (ORCPT ); Mon, 24 Aug 2020 22:51:26 -0400 Received: from mga18.intel.com ([134.134.136.126]:37741 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728475AbgHYCvX (ORCPT ); Mon, 24 Aug 2020 22:51:23 -0400 IronPort-SDR: aNNy+fTas+FfhelcOkhKa8/pauwNQWILD5v5v8c+Q6D8RDGGWRVamZ5Wh+iP3spisuVRXUOuYa iRczT4P79e3w== X-IronPort-AV: E=McAfee;i="6000,8403,9723"; a="143690836" X-IronPort-AV: E=Sophos;i="5.76,350,1592895600"; d="scan'208";a="143690836" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Aug 2020 19:51:22 -0700 IronPort-SDR: Hbsc/DNgUbWexPZ4WZm8kTgoqvObw+oSaAC7YhC3NmWvkyjkJuTf226MmSvl5jrnamSEmoTTRQ otTZf6Dm/VLw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.76,350,1592895600"; d="scan'208";a="312409865" Received: from shsi6026.sh.intel.com ([10.239.147.135]) by orsmga002.jf.intel.com with ESMTP; 24 Aug 2020 19:51:19 -0700 From: shuo.a.liu@intel.com To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , "H . Peter Anvin" , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Sean Christopherson , Yu Wang , Reinette Chatre , x86@kernel.org, Shuo Liu , Zhi Wang , Zhenyu Wang Subject: [PATCH 13/17] virt: acrn: Introduce interfaces to query C-states and P-states allowed by hypervisor Date: Tue, 25 Aug 2020 10:45:13 +0800 Message-Id: <20200825024516.16766-14-shuo.a.liu@intel.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200825024516.16766-1-shuo.a.liu@intel.com> References: <20200825024516.16766-1-shuo.a.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shuo Liu The C-states and P-states data are used to support CPU power management. The hypervisor controls C-states and P-states for a User VM. ACRN userspace need to query the data from the hypervisor to build ACPI tables for a User VM. HSM provides ioctls for ACRN userspace to query C-states and P-states data obtained from the hypervisor. Signed-off-by: Shuo Liu Reviewed-by: Zhi Wang Reviewed-by: Reinette Chatre Cc: Zhi Wang Cc: Zhenyu Wang Cc: Yu Wang CC: Reinette Chatre --- drivers/virt/acrn/hsm.c | 69 +++++++++++++++++++++++++++++++++++ drivers/virt/acrn/hypercall.h | 12 ++++++ include/uapi/linux/acrn.h | 35 ++++++++++++++++++ 3 files changed, 116 insertions(+) diff --git a/drivers/virt/acrn/hsm.c b/drivers/virt/acrn/hsm.c index 11369fb2d1c5..c0f33bc505e2 100644 --- a/drivers/virt/acrn/hsm.c +++ b/drivers/virt/acrn/hsm.c @@ -43,6 +43,67 @@ static int acrn_dev_open(struct inode *inode, struct file *filp) return 0; } +static int pmcmd_ioctl(u64 cmd, void __user *uptr) +{ + struct acrn_pstate_data *px_data; + struct acrn_cstate_data *cx_data; + u64 *pm_info; + int ret = 0; + + switch (cmd & PMCMD_TYPE_MASK) { + case ACRN_PMCMD_GET_PX_CNT: + case ACRN_PMCMD_GET_CX_CNT: + pm_info = kmalloc(sizeof(u64), GFP_KERNEL); + if (!pm_info) + return -ENOMEM; + + ret = hcall_get_cpu_state(cmd, virt_to_phys(pm_info)); + if (ret < 0) { + kfree(pm_info); + break; + } + + if (copy_to_user(uptr, pm_info, sizeof(u64))) + ret = -EFAULT; + kfree(pm_info); + break; + case ACRN_PMCMD_GET_PX_DATA: + px_data = kmalloc(sizeof(*px_data), GFP_KERNEL); + if (!px_data) + return -ENOMEM; + + ret = hcall_get_cpu_state(cmd, virt_to_phys(px_data)); + if (ret < 0) { + kfree(px_data); + break; + } + + if (copy_to_user(uptr, px_data, sizeof(*px_data))) + ret = -EFAULT; + kfree(px_data); + break; + case ACRN_PMCMD_GET_CX_DATA: + cx_data = kmalloc(sizeof(*cx_data), GFP_KERNEL); + if (!cx_data) + return -ENOMEM; + + ret = hcall_get_cpu_state(cmd, virt_to_phys(cx_data)); + if (ret < 0) { + kfree(cx_data); + break; + } + + if (copy_to_user(uptr, cx_data, sizeof(*cx_data))) + ret = -EFAULT; + kfree(cx_data); + break; + default: + break; + } + + return ret; +} + static long acrn_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long ioctl_param) { @@ -55,6 +116,7 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd, struct acrn_msi_entry *msi; struct acrn_pcidev *pcidev; struct page *page; + u64 cstate_cmd; int ret = 0; if (cmd == ACRN_IOCTL_GET_API_VERSION) { @@ -234,6 +296,13 @@ static long acrn_dev_ioctl(struct file *filp, unsigned int cmd, case ACRN_IOCTL_CLEAR_VM_IOREQ: acrn_ioreq_request_clear(vm); break; + case ACRN_IOCTL_PM_GET_CPU_STATE: + if (copy_from_user(&cstate_cmd, (void *)ioctl_param, + sizeof(cstate_cmd))) + return -EFAULT; + + ret = pmcmd_ioctl(cstate_cmd, (void __user *)ioctl_param); + break; default: pr_warn("Unknown IOCTL 0x%x!\n", cmd); ret = -EINVAL; diff --git a/drivers/virt/acrn/hypercall.h b/drivers/virt/acrn/hypercall.h index f220358633ab..ce8fdca76394 100644 --- a/drivers/virt/acrn/hypercall.h +++ b/drivers/virt/acrn/hypercall.h @@ -42,6 +42,9 @@ #define HC_ASSIGN_PCIDEV _HC_ID(HC_ID, HC_ID_PCI_BASE + 0x05) #define HC_DEASSIGN_PCIDEV _HC_ID(HC_ID, HC_ID_PCI_BASE + 0x06) +#define HC_ID_PM_BASE 0x80UL +#define HC_PM_GET_CPU_STATE _HC_ID(HC_ID, HC_ID_PM_BASE + 0x00) + /** * hcall_get_api_version() - Get API version from hypervisor * @api_version: Service VM GPA of version info @@ -239,4 +242,13 @@ static inline long hcall_reset_ptdev_intr(u64 vmid, u64 irq) return acrn_hypercall2(HC_RESET_PTDEV_INTR, vmid, irq); } +/* + * hcall_get_cpu_state() - Get P-states and C-states info from the hypervisor + * @state: Service VM GPA of buffer of P-states and C-states + */ +static inline long hcall_get_cpu_state(u64 cmd, u64 state) +{ + return acrn_hypercall2(HC_PM_GET_CPU_STATE, cmd, state); +} + #endif /* __ACRN_HSM_HYPERCALL_H */ diff --git a/include/uapi/linux/acrn.h b/include/uapi/linux/acrn.h index a20bee88cf9a..d5bd2b7dfd85 100644 --- a/include/uapi/linux/acrn.h +++ b/include/uapi/linux/acrn.h @@ -363,6 +363,38 @@ struct acrn_msi_entry { __u64 msi_data; }; +struct acrn_acpi_generic_address { + __u8 space_id; + __u8 bit_width; + __u8 bit_offset; + __u8 access_size; + __u64 address; +} __attribute__ ((__packed__)); + +struct acrn_cstate_data { + struct acrn_acpi_generic_address cx_reg; + __u8 type; + __u32 latency; + __u64 power; +} __attribute__((aligned(8))); + +struct acrn_pstate_data { + __u64 core_frequency; + __u64 power; + __u64 transition_latency; + __u64 bus_master_latency; + __u64 control; + __u64 status; +} __attribute__((aligned(8))); + +#define PMCMD_TYPE_MASK 0x000000ff +enum acrn_pm_cmd_type { + ACRN_PMCMD_GET_PX_CNT, + ACRN_PMCMD_GET_PX_DATA, + ACRN_PMCMD_GET_CX_CNT, + ACRN_PMCMD_GET_CX_DATA, +}; + /* The ioctl type, documented in ioctl-number.rst */ #define ACRN_IOCTL_TYPE 0xA2 @@ -417,4 +449,7 @@ struct acrn_msi_entry { #define ACRN_IOCTL_DEASSIGN_PCIDEV \ _IOW(ACRN_IOCTL_TYPE, 0x56, struct acrn_pcidev) +#define ACRN_IOCTL_PM_GET_CPU_STATE \ + _IOWR(ACRN_IOCTL_TYPE, 0x60, __u64) + #endif /* _UAPI_ACRN_H */ -- 2.28.0